Circularly polarizing RF antenna for an MRI apparatus

Details Circularly polarizing RF antenna for an MRI apparatus Circularly polarizing RF antenna for an MRI apparatus

1990-08-10

1992-09-01

Tokar, Michael J.

Electricity: measuring and testing

Particle precession resonance

Spectrometer components

G01R 3320

Patent

active

051442396

ABSTRACT:
A circularly polarizing RF antenna suitable for use in a magnetiic resonance imaging tomography apparatus has four current loops, each formed by two U-shaped conductors with the ends of the lateral legs of the U-shaped conductors disposed opposite to each other in mirror-symmetric fashion, and the ends of the lateral legs being bridged by a resonant capacitor. The current loops are arranged on a carrier which forms a portion of a hollow cylinder, and which is divided in an axial direction between two of the current loops, so that at least one of the current loops is removable without electrical contacts. A divisible RF antenna is thus achieved into which a head or a knee joint can be easily introduced for imaging.

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"Quadrature Detection Coils-A Further .sqroot.2 Improvement in Sensitivity" Chen et al. J. Mag. Res. vol. 54 (1983) pp. 234-237.
"A Quadrature Probe for Adult Head NMR Imaging" Sank et al. Book of Abstracts Third Annual Meeting, Society of Magnetic Resonance in Medicine (1984) pp. 650-651.

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